JPH0321464U

JPH0321464U -

Info

Publication number: JPH0321464U
Application number: JP8251489U
Authority: JP
Priority date: 1989-07-13
Filing date: 1989-07-13
Publication date: 1991-03-04

Description

[Brief explanation of the drawing]

第１図は、本考案のマンホール蓋用鍵穴塞栓の
一例を示す一部切欠斜視図、第２図は、第１図と
は異なる本考案のマンホール蓋用鍵穴塞栓の別の
一例を示す断面図、第３図は、第１図及び第２図
と異なる本考案のマンホール蓋用鍵穴塞栓の他の
一例を示す斜視図、第４図は、第１図ないし第３
図のマンホール蓋用鍵穴塞栓のマンホール蓋鍵穴
への取付け方法を説明するための図面、第５図は
、ボルトを弛めた際の本考案のマンホール蓋用鍵
穴塞栓の状態を表わす断面図、第６図は、ボルト
締付け時の本考案のマンホール蓋用鍵穴塞栓の状
態を表わす断面図である。１……塞栓部分、１ａ……ボルト貫通穴、１ｂ
……周面、１ｃ……突起、１ｄ……縦溝、２……
板状キヤツプ、２ａ……板状キヤツプ上面、２ｂ
……窪み、３……ナツト、３ａ……ネジ穴、４…
…ボルト、４ａ……ボルト締付け部分、５……ピ
ン、６……マンホール蓋、６ａ……鍵穴、６ａｓ
……鍵穴側穴、６ａｏ……鍵穴中心穴。 FIG. 1 is a partially cutaway perspective view showing an example of the keyhole embolization for manhole covers of the present invention, and FIG. 2 is a sectional view showing another example of the keyhole embolization for manhole covers of the present invention, which is different from FIG. 1. , FIG. 3 is a perspective view showing another example of the keyhole embolization for a manhole cover of the present invention, which is different from FIGS. 1 and 2, and FIG.
Figure 5 is a cross-sectional view showing the state of the manhole cover keyhole embolus of the present invention when the bolt is loosened; FIG. 6 is a cross-sectional view showing the state of the manhole cover keyhole plug of the present invention when the bolt is tightened. 1... Embolization part, 1a... Bolt through hole, 1b
...Surrounding surface, 1c...Protrusion, 1d...Vertical groove, 2...
Plate cap, 2a...Top surface of plate cap, 2b
... hollow, 3 ... nut, 3a ... screw hole, 4 ...
...Bolt, 4a... Bolt tightening part, 5... Pin, 6... Manhole cover, 6a... Keyhole, 6as
...Keyhole side hole, 6ao...Keyhole center hole.

Claims

[Scope of Claim for Utility Model Registration] 1. An embolization part made of an elastic material is inserted into a keyhole in the shape of a circular center hole drilled in a manhole cover, which is connected in the radial direction and has a protruding side hole. A keyhole embolizer for a manhole cover which covers and closes the keyhole with a plate-like cap connected to the manhole cover, wherein the embolus portion has a nut embedded therein and integrated with the keyhole, and has a screw hole of the nut embedded inside the keyhole in the keyhole insertion direction. A communicating bolt through hole is drilled, and the outer circumferential surface fits loosely into the center hole of the keyhole when the key is inserted, and when the bolt is tightened, it expands in the outer diameter direction and is crimped. The cap is made of an elastic cylindrical body with a protrusion that can be stopped, and the embolization part and the plate cap made of a rigid thin plate are integrated with the plate cap and the bolt tightening part. A keyhole embolus for a manhole cover, characterized in that the keyhole embolus is connected by screwing into the bolt and passing through a bolt through hole. 2. The keyhole embolizer for a manhole cover according to claim 1, wherein the open end of the bolt projects in the radial direction. 3. The keyhole embolization for a manhole cover according to claim 1 or 2, wherein grooves are carved in the axial direction of the outer peripheral surface of the embolization portion to form uneven stripes.